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MERRA-2 tavg3_2d_glc_Nx is a 3-hourly time-averaged data collection providing assimilated land ice surface diagnostics. The dataset is produced by NASA's Global Modeling and Assimilation Office using the GEOS model and covers the period from 1980 to the present. It includes variables such as fractional area of glaciated surface snow cover, snow mass, and snow depth.
Data filenames differ for reprocessed versions; users should check the linked reprocessing records. Data access requires registration with NASA Earthdata.